> Axum and Actix are phenomenal web frameworks

Compared to what? I see ASP.NET Core and Quarkus very competitive. The virtual threads in Java are great, paired with structured concurrency IMHO.

If I have to go microservice or API, I would choose FastAPI for fastest delivery and if I have to rewrite, Go, unless it is massive scale and scaling horizontally becomes a headache I would not consider Rust/C++ for this.

All the backend, etc. for the company I have been working for is C++ for the fast parts but all tools around are Python (with NiceGUI and Flask mostly).

I think the combination is quite powerful, btw.